Tracing-cloth.



TIMTE STATEfi PATENT OFFICE.

ROBERT CLAY, OF CHEADLE, ENGLAND.

TRACINGr-GLOTH.

No Drawing.

To all whom it may concern:

Be it known that I, ROBERT CLAY, a British subject, residing at Cheadle, county of Chester, England, have invented certain new and fabric finely woven and rendered transparent by impregnation with a filling substance. This material is used for drawing vor printing upon with Indian or printers ink and the object of the present invention is to render the surface capable of taking or absorbing the ink and to obviate the use of chalk or other material applied to'the surface of the finished cloth for this purpose.

It consists in embossing the cloth on the side to be inked (one or both sides) with a finely engraved pattern surface to produce a series of depressions therein to receive the ink and thereby roughen the surface of the cloth.

In carrying out the invention I take the tracing cloth which has been prepared and glazed in the ordinary way and'subject it in a dry state to the heavy pressure of an engraved embossing roller to impart a pattern Or roughness on the surface of the cloth, on one or both sides.

The embossing roller is engraved with a series of fine lines placed closely together in any form of pattern such as lines parallel to the axis of the roller, lines circumferentially around the roller, lines spirally around the roller, lines arranged in circles, triangles, squares, octagons or other geometrical figures, or. lines in the form ofany other pattern. If desired, the roller may be engraved with fine dots placed closely together in the form known as stippling, or the engraving may be a combination of both lines and dots.

It is to be understood that the engraving on the roller must be exceedingly fine and close as the object is not to produce a visible pattern or ornamental effect upon the cloth but to give a certain roughness to the surface Copies of this patent may be obtained for Specification of Letters Patent.

Patented Sept. 21, 1915.

Application filed June 6, 1914. Serial No. 843,560. 7

of the. cloth to cause it to more readily receive and absorb the ink when being drawn upon with a pen or being printed upon.

During the process of embossing which Wlll be done between a pair of rollers the engraved embossing roller may be employed cold or it may be heated.

What I claim as my invention and desire to protect by Letters Patent is 1. The method of producing a tracing cloth with a surface which will take or absorb ink by roughening the surface with a very finely engraved pattern surface substantially as described.

2. The method of producing a tracing cloth with a surface which will readily take or absorb ink consisting in roughening the surface by embossingthe surface with a very finely engraved roller substantially as described.

3. The method of producing a tracing cloth which will readily take or absorb ink consisting in roughening the surface by embossing with a roller engraved with very fine lines substantially as described. t. As a new article of manufacture a tracing cloth with a roughened embossed surface 6. As a new article of manufacture a tracing cloth embossed upon both sides to roughen the surfaces to cause them to read ily absorb or take up ink substantially as described. a

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ROBERT CLAY.

WVitnesses:

I. OWDEN OBRIEN, GEO. I-I. OBRIEN.

five cents each, by addressing the "Commissioner of Patents, Washington, D. G. 

